In the vibrant music scene of the late 1960s, a young and aspiring musician named Geun-tae finds himself drawn to the legendary C’est si bon music lounge. There, he encounters two talented musicians, Hyung-joo and Chang-sik, and together they form a promising band.

Their lives intertwine with the enigmatic and beautiful Ja-young, who becomes their muse and love interest. As their music gains popularity, so does their bond with Ja-young. However, fate intervenes, and Ja-young must make a difficult choice that will forever change the course of their lives.

Years later, in the 1990s, destiny brings Geun-tae and Ja-young together once again. As they reunite, old memories resurface, and they must confront the past and the choices they made.